Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/linux/ahci_platform.h b/include/linux/ahci_platform.h
index eaedca5..6782f0d 100644
--- a/include/linux/ahci_platform.h
+++ b/include/linux/ahci_platform.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  * AHCI SATA platform driver
  *
@@ -5,11 +6,6 @@
  *   Jeff Garzik <jgarzik@pobox.com>
  * Copyright 2010  MontaVista Software, LLC.
  *   Anton Vorontsov <avorontsov@ru.mvista.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
  */
 
 #ifndef _AHCI_PLATFORM_H